Summing-up monthly data

Hi  community,

any help appreciated.

My data look like this

Dec 14      1        Quote by Mr. X
Dec 14      1        Quote by Mr. Y

Dec 14      1        Quote by Mr. z
Jan 15      1        Quote by Mr. X

Jan 15      1        Quote by Mr. Y

Jan 15      1        Quote by Mr. Z

Dec 15      1        Quote by Mr. X

Dec 15      1        Quote by Mr. Y

Dec 15      1        Quote by Mr. Z

I would like to dispaly the data in a bar chart shwing the number of Quotes in Dec 14 (3), then Jan 15 (3), then Dec 15 (3).

No way!

I only get any kind of charts showing:

Dec (6), Jan (3). 

No developmnet is shown. Just the monthly aggregation regardless the year. I can campare which month is statisticly the best. But can't obsereve the month by month development from year to year. 

Only when my input data looks like this i was able to get the result i wish:

Dec 14  - 3 Quites

Jan 15 - 3 Quotes

Dec 15 - 3 Quotes

Unfortunately that's not the way my CRM outputs the data. It#s always like in the first example.

Any ideas?

Thank you!

Alex